date and time created 83/08/17 15:48:20 by edward

[unix-history] / usr / src / usr.bin / window / wwlabel.c

#ifndef lint
static  char *sccsid = "@(#)wwlabel.c   3.3 83/08/16";
#endif

#include "ww.h"

/*
* Label window w on f,
* at 1 line above w and 'where' columns from it's left edge.
* Gross, but it works.
*/
wwlabel(w, f, where, l, mode)
struct ww *w;
struct ww *f;
char *l;
{
       int i;
       register j;
       register char *p;
       register char *win;
       register union ww_char *buf;
       register union ww_char *ns;
       register char *fmap;
       char *touched;

       if ((i = w->ww_w.t - 1 - f->ww_w.t) < 0)
               return -1;
       j = w->ww_w.l + where;
       j = MAX(j, f->ww_w.l);
       win = &f->ww_win[i][j - f->ww_w.l];
       buf = &f->ww_buf[w->ww_scroll + i][j - f->ww_w.l];
       i += f->ww_w.t;
       ns = &wwns[i][j];
       fmap = &wwfmap[i][j];
       touched = &wwtouched[i];
       j = MIN(w->ww_w.r, f->ww_w.r) - j;

       for (; j > 0 && *l;)
               for (p = unctrl(*l++); j > 0 && *p; j--) {
                       /* can't label if not already framed */
                       if (*win & WWM_GLS) {
                               p++;
                               buf++;
                               ns++;
                               win++;
                               fmap++;
                       } else if (*win & WWM_COV) {
                               buf++->c_w = mode << WWC_MSHIFT | *p++;
                               *fmap++ |= WWF_LABEL;
                               ns++;
                               win++;
                       } else {
                               *touched = 1;
                               ns++->c_w = (buf++->c_w
                                       = mode << WWC_MSHIFT | *p++)
                                               ^ *win++ << WWC_MSHIFT;
                               *fmap++ |= WWF_LABEL;
                       }
               }

       return 0;
}